One Cubs fan was apparently feeling pretty invincible after watching Chicago finally shake its World Series curse. It nearly cost him dearly. In a horrifying scene captured on video, Cubs fan Alan Anderson, 36, was knocked out cold by an Indians fan outside Progressive Field . Chris Vallimont, a 19-year-old Cleveland fan who took the video and posted it on Twitter, told TMZ Sports that Anderson got into a heated exchange with the unidentified Indians fan. Anderson even dared him to take a swing.